Performance should be the same (same architecture and transistor count), but because of the smaller node used by Samsung, the A9 produced by them should a little cooler than the TSMC one.
Spotting which one is from TSMC or Samsung could be pretty difficult, since the temperature difference between chips could be less than 1-2 degrees.
Further investigation should be made with a X-ray microscope, the see the real differences between both manufacturers.
Lorsqu'il en aura reçu, il pourra afficher un graphique de sa réputation au fil du temps.
Voici un aperçu de ce à quoi ressemble ce graphique :
Aucun point de réputation obtenu pour l'instant.